The whole track is regularly used. Not that it is F-1 ready anymore. I was lucky enough to see a F-1 race there (Villeneuve and Hill's Williams danced around the track while Schumacher's Ferrari was a raging, uncontrollable beast)
Need I say I'm from Argentina?
If PD were to put this historical track, I highly recommend all trims of the track, including the one @die996 added - regardless whether or not they're no longer used.